On Sat, Apr 08, 2000 at 04:22:58AM +0000, Brad Hards wrote:
> I am trying to update the user documentation (again). One of the tactics
> that I used previously is to count interrupts with mouse clicks. With
> pre4-4, I am seeing a huge number of interrupts (around 100Hz).
> I remember seeing a mail from Georg that suggested that the rate would
> be cut down, but I assume that there will always be some interrupts, no?
The interrupt rate was about 1kHz, simply because I didn't switched of the
cleanup interrupts for asynchronoulsy killed URBs. This should be fixed in
pre5. So, if there's no USB traffic AND no killed URBs AND no URBs with
timeout, there should be no UHCI-interrupts.
All other cases can produce interrupt rates up to 1kHz, but not for a long
time (usually 1-3ms). Pending URBs with a specified timeout cause a
interrupt rate of about 30Hz as long as these URBs are not finished. This
is IMHO acceptable.
Note that the old 1kHz-behavior was AFAIK specific to usb-uhci.
--
Bye
Georg Acher, [EMAIL PROTECTED]
http://www.in.tum.de/~acher/
"Oh no, not again !" The bowl of petunias
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